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Visual Improvements after Perceptual Learning Transfer from Normoxia to Hypoxia.

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Title: Visual Improvements after Perceptual Learning Transfer from Normoxia to Hypoxia.
Authors: Wu, Di, Xu, Pengbo, Liu, Na, Li, Chenxi, Huang, He, Xiao, Wei
Source: International Journal of Aerospace Psychology. Jan-Mar2021, Vol. 31 Issue 1, p1-16. 16p.
Subjects: Perceptual learning, Hypoxemia, Aeronautical safety measures, Contrast sensitivity (Vision), Nonverbal learning
Abstract: Objective: This study aimed to evaluate vision improvement in hypoxia following normoxic perceptual learning. Background: Visual functions are important for flight safety. However, the potential of perceptual learning to compensate for hypoxic vision damage is unclear. Method: Seven observers enrolled in this study and were exposed to a hypoxic (11.5% O2) and a mesopic (3 cd/m2) environment. Visual acuity (VA) and contrast sensitivity function (CSF) were evaluated in normoxia and hypoxia before and after the 8 daily training sessions. All observers trained in a monocular sine-wave grating detection task near their individual cutoff spatial frequencies while breathing normoxic gas. Results: The contrast sensitivity (CS) at the trained spatial frequency, the area under the log CSF (AULCSF) and VA decreased in a hypoxic environment. Additionally, all visual performances (i.e., CS, AULCSF and VA), regardless of whether they were measured in the normoxic or hypoxic condition, improved following normoxic perceptual learning. The degree of visual improvement did not differ between normoxia and hypoxia, indicating that visual improvement is completely transferable from normoxia to hypoxia. Conclusions: Preliminary evidence suggests that visual improvement remains even under environmental changes, and perceptual learning may be a noninvasive way to compensate for vision decreases in hypoxia. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Aerospace Psychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Group: Ti
  Data: Visual Improvements after Perceptual Learning Transfer from Normoxia to Hypoxia.
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  Data: <searchLink fieldCode="AR" term="%22Wu%2C+Di%22">Wu, Di</searchLink><br /><searchLink fieldCode="AR" term="%22Xu%2C+Pengbo%22">Xu, Pengbo</searchLink><br /><searchLink fieldCode="AR" term="%22Liu%2C+Na%22">Liu, Na</searchLink><br /><searchLink fieldCode="AR" term="%22Li%2C+Chenxi%22">Li, Chenxi</searchLink><br /><searchLink fieldCode="AR" term="%22Huang%2C+He%22">Huang, He</searchLink><br /><searchLink fieldCode="AR" term="%22Xiao%2C+Wei%22">Xiao, Wei</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Aerospace+Psychology%22">International Journal of Aerospace Psychology</searchLink>. Jan-Mar2021, Vol. 31 Issue 1, p1-16. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Perceptual+learning%22">Perceptual learning</searchLink><br /><searchLink fieldCode="DE" term="%22Hypoxemia%22">Hypoxemia</searchLink><br /><searchLink fieldCode="DE" term="%22Aeronautical+safety+measures%22">Aeronautical safety measures</searchLink><br /><searchLink fieldCode="DE" term="%22Contrast+sensitivity+%28Vision%29%22">Contrast sensitivity (Vision)</searchLink><br /><searchLink fieldCode="DE" term="%22Nonverbal+learning%22">Nonverbal learning</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Objective: This study aimed to evaluate vision improvement in hypoxia following normoxic perceptual learning. Background: Visual functions are important for flight safety. However, the potential of perceptual learning to compensate for hypoxic vision damage is unclear. Method: Seven observers enrolled in this study and were exposed to a hypoxic (11.5% O2) and a mesopic (3 cd/m2) environment. Visual acuity (VA) and contrast sensitivity function (CSF) were evaluated in normoxia and hypoxia before and after the 8 daily training sessions. All observers trained in a monocular sine-wave grating detection task near their individual cutoff spatial frequencies while breathing normoxic gas. Results: The contrast sensitivity (CS) at the trained spatial frequency, the area under the log CSF (AULCSF) and VA decreased in a hypoxic environment. Additionally, all visual performances (i.e., CS, AULCSF and VA), regardless of whether they were measured in the normoxic or hypoxic condition, improved following normoxic perceptual learning. The degree of visual improvement did not differ between normoxia and hypoxia, indicating that visual improvement is completely transferable from normoxia to hypoxia. Conclusions: Preliminary evidence suggests that visual improvement remains even under environmental changes, and perceptual learning may be a noninvasive way to compensate for vision decreases in hypoxia. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Aerospace Psychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1080/24721840.2020.1844568
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      – Code: eng
        Text: English
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      – SubjectFull: Perceptual learning
        Type: general
      – SubjectFull: Hypoxemia
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      – SubjectFull: Aeronautical safety measures
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      – SubjectFull: Contrast sensitivity (Vision)
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              Text: Jan-Mar2021
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